“It is quite possible that, even if you set the most relevant, realistic goals, you may not achieve them in the way or the time you wanted to. Life may throw something unexpected in your path, which stops you from achieving what you want, when you want. This is not failure. Feeling like you have failed is bound to lead to low mood, and can often come about if things haven't quite gone according to plan. However, the best thing to do is to draw a mental line under the experience, learn from what has happened and try again. As long as you are still trying, you are working towards your long-term aims; and as long as you are doing that, you are never truly failing.”
Book:How to Be Confident